Golang FileSystem.Truncate Examples

Example #1

File: rw_test.go Project: Richardphp/noms

func (s *fuseTestSuite) TestSimpleFile() {
	datasetName := "TestSimpleFile"
	str := spec.CreateValueSpecString("ldb", s.LdbDir, datasetName)

	var testfs pathfs.FileSystem

	start(str, func(fs pathfs.FileSystem) { testfs = fs })

	file, code := testfs.Create("coconut", uint32(os.O_CREATE|os.O_RDWR), 0644, nil)
	assert.Equal(s.T(), fuse.OK, code)
	n, code := file.Write([]byte("Lime!"), 0)
	assert.Equal(s.T(), uint32(5), n)
	assertAttr(s, testfs, "coconut", 0644|fuse.S_IFREG, 5)

	data := make([]byte, 5)
	rr, code := file.Read(data, 0)
	assert.Equal(s.T(), fuse.OK, code)
	assert.Equal(s.T(), 5, rr.Size())
	assert.Equal(s.T(), "Lime!", string(data))

	code = testfs.Truncate("coconut", 4, nil)
	assert.Equal(s.T(), fuse.OK, code)
	assertAttr(s, testfs, "coconut", 0644|fuse.S_IFREG, 4)
	rr, code = file.Read(data, 0)
	assert.Equal(s.T(), fuse.OK, code)
	assert.Equal(s.T(), 4, rr.Size())
	assert.Equal(s.T(), "Lime!", string(data))
}